<div class="container">
<h1>Security update for apptainer</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:3417-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-07-30T07:06:34Z</td>
</tr>
<tr>
<th>Rating:</th>
<td>important</td>
</tr>
<tr>
<th>References:</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1266656">bsc#1266656</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272115">bsc#1272115</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>
Cross-References:
</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-39821.html">CVE-2026-39821</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-56852.html">CVE-2026-56852</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>CVSS scores:</th>
<td>
<ul class="list-group">
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-39821</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">9.1</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-39821</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.4</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-39821</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">8.2</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-39821</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">9.6</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-56852</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">6.0</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-56852</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">5.9</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-56852</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">HPC Module 15-SP7</li>
<li class="list-group-item">openSUSE Leap 15.6</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Real Time 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP6</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP6 LTSS</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP7</li>
<li class="list-group-item">SUSE Package Hub 15 15-SP7</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves two vulnerabilities can now be installed.</p>
<h2>Description:</h2>
<p>This update for apptainer fixes the following issues:</p>
<ul>
<li>CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allows for validation
bypass and privilege escalation (bsc#1266656).</li>
<li>CVE-2026-56852: golang.org/x/text/unicode/norm: infinite loop on truncated/invalid UTF-8 input (bsc#1272115).</li>
</ul>
<p>Changes for apptainer:</p>
<ul>
<li>
<p>Update apptainer to version 1.5.3:</p>
</li>
<li>
<p>If the ptrace() system call does not work while building an image as
an unprivileged user, skip using PRoot to preserve file ownership and
print an INFO message.</p>
</li>
<li>Bind getopt from the host when using fakeroot command mode, to make
the fakeroot command work with base containers which no longer contain
getopt by default.</li>
<li>Extended the mksquashfs segmentation fault workaround for cases
where mksquashfs uses many processor cores.</li>
</ul>
<h2>Patch Instructions:</h2>
<p>
To install this SUSE update use the SUSE recommended
installation methods like YaST online_update or "zypper patch".<br/>
Alternatively you can run the command listed for your product:
</p>
<ul class="list-group">
<li class="list-group-item">
SUSE Package Hub 15 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-3417=1</code>
</li>
<li class="list-group-item">
HPC Module 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-HPC-15-SP7-2026-3417=1</code>
</li>
<li class="list-group-item">
openSUSE Leap 15.6
<br/>
<code>zypper in -t patch SUSE-2026-3417=1</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 15 SP6 LTSS
<br/>
<code>zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-3417=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
<ul>
<li>apptainer-sle15_6-1.5.3-150600.4.34.2</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 x86_64)
<ul>
<li>apptainer-1.5.3-150600.4.34.2</li>
<li>apptainer-debuginfo-1.5.3-150600.4.34.2</li>
</ul>
</li>
<li>
openSUSE Leap 15.6 (noarch)
<ul>
<li>apptainer-sle16-1.5.3-150600.4.34.2</li>
<li>apptainer-leap-1.5.3-150600.4.34.2</li>
<li>apptainer-sle15_7-1.5.3-150600.4.34.2</li>
<li>apptainer-sle15_6-1.5.3-150600.4.34.2</li>
</ul>
</li>
<li>
openSUSE Leap 15.6 (aarch64 x86_64)
<ul>
<li>apptainer-1.5.3-150600.4.34.2</li>
<li>apptainer-suid-1.5.3-150600.4.34.2</li>
<li>apptainer-debuginfo-1.5.3-150600.4.34.2</li>
<li>apptainer-suid-debuginfo-1.5.3-150600.4.34.2</li>
</ul>
</li>
<li>
SUSE Package Hub 15 15-SP7 (aarch64 x86_64)
<ul>
<li>apptainer-1.5.3-150600.4.34.2</li>
<li>apptainer-suid-1.5.3-150600.4.34.2</li>
</ul>
</li>
<li>
HPC Module 15-SP7 (noarch)
<ul>
<li>apptainer-sle15_7-1.5.3-150600.4.34.2</li>
</ul>
</li>
<li>
HPC Module 15-SP7 (aarch64 x86_64)
<ul>
<li>apptainer-1.5.3-150600.4.34.2</li>
<li>apptainer-debuginfo-1.5.3-150600.4.34.2</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-39821.html">https://www.suse.com/security/cve/CVE-2026-39821.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-56852.html">https://www.suse.com/security/cve/CVE-2026-56852.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1266656">https://bugzilla.suse.com/show_bug.cgi?id=1266656</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1272115">https://bugzilla.suse.com/show_bug.cgi?id=1272115</a>
</li>
</ul>
</div>